S4000P - International specification for developing and continuously improving preventive maintenance is a specification developed jointly by a multinational team from the AeroSpace and Defence Industries Association of Europe (ASD) and Aerospace Industries Association (AIA).
[2] The main purpose of this specification is to assist all parties, including regulatory authorities, involved in the analysis process developing and releasing initial PMTR and intervals for new products prior entry into service.
Once developed, authorized and packaged into interval clusters in a product OMP, the S4000P In-Service Maintenance Optimization (ISMO) process enables continuously improving product maintenance during its in-service phase.
In parallel to the product design process, Preventive Maintenance Task Requirements (PMTR) with intervals and/or redesign requirements must be assessed on an analytical basis and be determined if applicable and effective.
According to the overall ASD scope, the specification S4000P must cover all types of products including any complex technical platform, system, equipment or facility (e.g. on air/sea/land, under the sea-/ground-level, in space).